Computer Engineering Commons^™

Computational Fluid Dynamics Analysis Of Butterfly Valve Performance Factors, Adam Del Toro

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Butterfly valves are commonly used to control fluid flow inside of piping systems. A butterfly valve typically consists of a metal disc formed around a central shaft, which acts as its axis of rotation. As a butterfly valve is rotated open, fluid is able to more readily flow past the valve. A butterfly valve’s design is important to understand and is commonly characterized by its own performance factors. How a butterfly valve will perform, while in operation at different opening angles and under different types of flow, is critical information for individuals planning and installing piping systems involving the valve. …

Cogtool-Helper: Leveraging Gui Functional Testing Tools To Generate Predictive Human Performance Models, Amanda Swearngin

School of Computing: Dissertations, Theses, and Student Research

Numerous tools and techniques for human performance modeling have been introduced in the field of human-computer interaction. With such tools comes the ability to model legacy applications. Models can be used to compare design ideas to existing applications, or to evaluate products against those of competitors. One such mod- eling tool, CogTool, allows user interface designers and analysts to mock up design ideas, demonstrate tasks, and obtain human performance predictions for those tasks. This is one step towards a simple and complete analysis process, but it still requires a large amount of manual work. Graphical user interface (GUI) testing tools …

Error Estimation Techniques To Refine Overlapping Aerial Image Mosaic Processes Via Detected Parameters, William Glenn Bond

Dissertations

In this paper, I propose to demonstrate a means of error estimation preprocessing in the assembly of overlapping aerial image mosaics. The mosaic program automatically assembles several hundred aerial images from a data set by aligning them, via image registration using a pattern search method, onto a GIS grid.

The method presented first locates the images from a data set that it predicts will not align well via the mosaic process, then it uses a correlation function, optimized by a modified Hooke and Jeeves algorithm, to provide a more optimal transformation function input to the mosaic program. Using this improved …

Synthetic Aperture Radar Tool And Libraries: A Framework For Geo-Referenced Data Processing And Algorithm Prototyping, Nathan R. Crookston

All Graduate Plan B and other Reports, Spring 1920 to Spring 2023

Creating a system for Synthetic Aperture Radar (SAR) image formation can be a huge undertaking as it requires knowledge of several disparate domains. Researchers may be prevented from applying interesting techniques in a particular domain due to hurdles in working with those areas outside their area of interest. This paper presents the SyntheTic Aperture Radar Tool and Libraries (STARTAL) framework for SAR processing that simplifies adding new data formats and prototyping algorithms.

STARTAL provides a user interface for viewing the full data region on ground geometry, selecting sub-regions to process, and viewing processed results. Many common, difficult tasks are provided …

Spatial Queries In Wireless Broadcast Environments [Keynote Speech], Kyriakos Mouratidis

Research Collection School Of Computing and Information Systems

Wireless data broadcasting is a promising technique for information dissemination that exploits the computational capabilities of mobile devices, in order to enhance the scalability of the system. Under this environment, the data are continuously broadcast by the server, interleaved with some indexing information for query processing. Clients may tune in the broadcast channel and process their queries locally without contacting the server. In this paper we focus on spatial queries in particular. First, we review existing methods on this topic. Next, taking shortest path computation as an example, we showcase technical challenges arising in this processing model and describe techniques …

Security And Performance Verification Of Distributed Authentication And Authorization Tools, Seok Bae Yun

All Theses

Parallel distributed systems are widely used for dealing with massive data sets and high performance computing. Securing parallel distributed systems is problematic. Centralized security tools are likely to cause bottlenecks and introduce a single point of failure. In this paper, we introduce existing distributed authentication and authorization tools. We evaluate the quality of the security tools by verifying their security and performance.
For security tool verification, we use process calculus and mathematical modeling languages. Casper, Communicating Sequential Process (CSP) and Failure Divergence Refinement (FDR) to test for security vulnerabilities, Petri nets and Karp Miller trees are used to find performance …

Analysis Of The Detection Of Organophosphate Pesticides In Aqueous Solutions Using Hydrogen-Bond Acidic Coating On Sh-Saw Devices, Arnold Kweku Mensah-Brown, Darlington Mlambo, Fabien Josse Phd, Susan C. Schneider Phd

Electrical and Computer Engineering Faculty Research and Publications

The work presented in this paper focuses on the synthesis and characterization of a hybrid organic/inorganic chemically sensitive layer for rapid detection and analysis of OPs in aqueous solutions using SH-SAW devices. Coated SH-SAW devices on 36° YX-LiTaO and 42.75° YX-Quartz (ST-90° X Quartz), are used to determine the optimum operating conditions for achieving rapid sensor responses with high sensitivity. Three analytes (parathion-methyl, parathion, and paraoxon), having similar molecular mass and volume, are used to evaluate the performance of the hybrid organic/inorganic coating in terms of sensor properties of interest including sensitivity, selectivity, reproducibility. It is shown that the coating …

Dsm64: A Distributed Shared Memory System In User-Space, Stephen Alan Holsapple

Master's Theses

This paper presents DSM64: a lazy release consistent software distributed shared memory (SDSM) system built entirely in user-space. The DSM64 system is capable of executing threaded applications implemented with pthreads on a cluster of networked machines without any modifications to the target application. The DSM64 system features a centralized memory manager [1] built atop Hoard [2, 3]: a fast, scalable, and memory-efficient allocator for shared-memory multiprocessors.

In my presentation, I present a SDSM system written in C++ for Linux operating systems. I discuss a straight-forward approach to implement SDSM systems in a Linux environment using system-provided tools and concepts avail- …

Framework Development For Construction Safety Visualization, Kishor Shrestha

UNLV Theses, Dissertations, Professional Papers, and Capstones

Throughout the history of the construction industry, many fatalities and injuries have occurred in construction sites. One of the major causes of accidents is unsafe site conditions; basically, this is due to inadequate supervision. To improve upon the traditional supervision approach, this study proposes a `Framework Development for Construction Safety Visualization' approach. In addition to this, a computer vision Edge Detection Algorithm was developed and tested to convert construction site still images into edges of the objects in the images. The framework development of this study uses computer vision, robot vision, image compression, pattern recognition, internet transmission, network communication, and …

Extending The Hybridthread Smp Model For Distributed Memory Systems, Eugene Anthony Cartwright Iii

Graduate Theses and Dissertations

Memory Hierarchy is of growing importance in system design today. As Moore's Law allows system designers to include more processors within their designs, data locality becomes a priority. Traditional multiprocessor systems on chip (MPSoC) experience difficulty scaling as the quantity of processors increases. This challenge is common behavior of memory accesses in a shared memory environment and causes a decrease in memory bandwidth as processor numbers increase. In order to provide the necessary levels of scalability, the computer architecture community has sought to decentralize memory accesses by distributing memory throughout the system. Distributed memory offers greater bandwidth due to decoupled …

Traffic Counter Mobile Application, Victor Molano

College of Engineering: Graduate Celebration Programs

INTRODUCTION

Manual Counters:

•The vehicles counts and characteristics at signalized intersections and others transportation facilities are usually made using manual counters. These manual counters are mechanical or digital boards in which the user can record the different observations from the field. The use of these devices is usually required when more sophisticated methods are not available, when expensive equipment is not justified and for scholastic practices.

Node Filtering And Face Routing For Sensor Network, Umang Amatya

College of Engineering: Graduate Celebration Programs

Main Contributions

•Efficient Algorithms for identifying Redundant Sensor Nodes

•New Technique for Filtering Redundant Nodes in Sensor Network

•Reliable Algorithm for Message Routing - Forwarding

•User Friendly Prototype Implementation in Java

•Results of Experimental Investigation

A Consumer Level Simulation Model For Demand Response Analysis On Smart Grid, Sungchul Lee, Yoohwan Kim

College of Engineering: Graduate Celebration Programs

With the growing awareness of the need for Smart Grid, various countries are taking initiatives for developing Smart Grid.

However, there is limited research on utilizing Smart Grid for Demand-Response (DR).

This study advances the current system of DR by creating a Smart Grid Simulator that allows an intuitive demand response analysis.

The simulator demonstrates that substantial amount of electric power can be reduced efficiently by selective demand control over Smart Grid.

The graphical interface allows generating the electrical usage data and displays both individual and aggregate usage data over time.

This research employs U.S. census data for accurate estimate …

Architecture For An Interactive Motion-Based Traffic Simulation Environment, Romesh Khaddar, Naveen Veeramisti, Alexander Paz, Pushkin Kachroo

College of Engineering: Graduate Celebration Programs

In simple words, the objective of this research is to identify the effect of human behavior on traffic To enhance the traffic simulation modeling realism by involving actual human beings navigating the system along with simulated entities in an immersive environment

Decimal Alu, Ming Zhu

College of Engineering: Graduate Celebration Programs

The decimal number system is used in many commercial applications, such as financial analysis, banking, tax calculation, currency conversion, insurance and accounting. With the explosively increasing amount the data to be proposed, computers are introduced to help deal with it. However, in digital Arithmetic Logic Unit (ALU) circuit systems, the binary number system is widely used for its simplicity and easy realization in physical layout. This project aims at constructing an ALU that contains decimal additions, subtractions and multiplications using binary coded decimal (BCD) on a binary system platform.

A Refreshable And Portable E-Braille System For The Blind And Visually Impaired, Mohammad Saadeh, Mohamed Trabia

College of Engineering: Graduate Celebration Programs

• Braille is a communication system to assist the blind and visually impaired.
• Present an approach to measure fingertip forces while identifying Braille characters.
• Implement a force sensory feedback in the device to measure the force developed on the fingertip.
• Introduce a preliminary design for the device.
• Build a prototype for the device and evaluate its functionality and integrate its components

Cognitive Congestion Control For Data Portal, Ershad Sharifahmadian, Shahram Latifi

College of Engineering: Graduate Celebration Programs

Network congestion is one of challenging tasks in communication networks and leads to queuing delay, packet loss or the blocking of new connections. Here, a data portal is considered as an application-based network, and a cognitive method is proposed to deal with congestion in this kind of network. The cognitive method is proposed to improve bandwidth sharing, and deal with congestion in a data portal. When the data portal is about climate change data, congestion control is more emphasized, because the scientific climate data is voluminous and there is a high traffic to/from data portal by the scientific community, research …

Millennium Systems On The Cloud: Experience On System Migration From Sun V490 To Vmware Platform, Yiu On Li, Jimmy Tsang

Hong Kong Innovative Users Group Meetings

No abstract provided.

Technological Advancements Of Cell Phones From 2008-2012, Chris Wholey

Senior Seminars

Five years ago when the words cell phone were said, thoughts were that it wasn't going to be more than a device that can send text messages and call people. Today when the words cell phone are said people think of hand held devices that have evolved into mini-computers with features of email, video-chat, and the boundless amounts of wireless internet access that they possess. This paper will explain the difference between 2G, 3G, and 4G and will also explain the terms smart phone, SD card, and RAM. Then it will show graphically what Nokia, Samsung, Motorola, Blackberry, and Apple …

Virtualization In High-Performance Computing: An Analysis Of Physical And Virtual Node Performance, Glendon M. Jungels

Purdue Polytechnic Masters Theses

The process of virtualizing computing resources allows an organization to make more efficient use of it's resources. In addtion, this process enables flexibility that deployment on raw hardware does not. Virtualization, however, comes with a performance penalty. This study examines the performance of utilizing virtualization technology for use in high performance computing to determine the suitibility of using this technology. It makes use of a small (4 node) virtual cluster as well as a 4 node physical cluster. The impacts on input/output operation are examined as well as performance of each cluster using two widely utilized tools, NAS Parallel Benchmarks …

Sample Investigating Systemand Method Of Use, Martin M. Liphardt, Thomas E. Tiwald, Blaine D. Johs, Jeffrey S. Hale, Craig M. Herzinger, Steven E. Green, Ping He, Ronald A. Synowicki, John A. Woollam

Department of Electrical and Computer Engineering: Faculty Publications

A spectroscopic system for adjusting spacing between an adjacent source/detector as a unit, and a sample, and a reflecting means for directing an incident beam which reflects from said sample back onto said sample and then into the detector along a locus which is in a plane of incidence that is offset from that of the incident beam, or directly from the reflecting means into the detector, including means for reducing reflections of a beam of electromagnetic from the back of a sample, including methodology of use.

Sample Investigating System And Method Of Use, Martin M. Liphardt, Thomas E. Tiwald, Blaine D. Johs, Jeffery S. Hale, Craig M. Herzinger, Steven E. Green, Ping He, Ronald A. Synowicki, John A. Woollam

Department of Electrical and Computer Engineering: Faculty Publications

A spectroscopic system for adjusting spacing between an adjacent source/detector as a unit, and a sample, and a reflecting means for directing an incident beam which reflects from said sample back onto said sample and then into the detector along a locus which is in a plane of incidence that is offset from that of the incident beam, or directly from the reflecting means into the detector, including means for reducing reflections of a beam of electromagnetic from the back of a sample, including methodology of use.

Wmu Mobile 2.0 For Iphone, Nathan R. Shiff

Honors Theses

As part of Western Michigan University's College of Engineering and Applied Sciences, the department of Computer Science requires that each undergraduate completes a senior design capstone project. The Lee Honors College allows the senior design project to fulfill the senior honors thesis requirement. In Computer Science, a senior design project can be a website, a desktop program, or in the case of WMU Mobile 2.0, a mobile application. Building on the work of the previous year's team, the app extends the functionality of WMU Mobile for iPhone. WMU Mobile 2.0 provides smooth support for the iPad, a redesigned visual interface, …

The Presence Of Regional Accents In Electrolarynx Speech And The Resultant Effect On Overall Intelligibility., Brian Madden, Eugene Coyle

Conference Papers

During voiced speech, the larynx provides quasi-periodic acoustic excitation of the vocal tract. In most electrolarynxes, mechanical vibrations are produced by a linear electromechanical actuator, the armature of which percusses against a metal or plastic plate at a frequency within the range of glottal excitation. In this paper, a phonological analysis of a section of results from an online perceptual intelligibility test was performed which compared speech produced using a novel hands-free electrolarynx and a commercially available electrolarynx. A portion of the test consisted of a closed-set format containing a selection of four sets of four random CVC audio samples …

Phone Lattice Reconstruction For Embedded Language Recognition In Lvcsr, Yuxiang Shan, Yan Deng, Jia Liu, Michael T. Johnson

Electrical and Computer Engineering Faculty Research and Publications

An increasing number of multilingual applications require language recognition (LRE) as a frontend, but desire low additional computational cost. This article demonstrates a novel architecture for embedding phone based language recognition into a large vocabulary continuous speech recognition (LVCSR) decoder by sharing the same decoding process but generating separate lattices. To compensate for the prior bias introduced by the pronunciation dictionary and the language model of the LVCSR decoder, three different phone lattice reconstruction algorithms are proposed. The underlying goals of these algorithms are to override pronunciation and grammar restrictions to provide richer phonetic information. All of the new algorithms …

Sketching 3d Animation, Innfarn Yoo

Department of Computer Graphics Technology Degree Theses

This thesis presents a method for creating natural 3D animation based on sketches. Our method provides novice and professional sketchers an easy, fast, and intuitive way to create three dimensional animations by drawing sketches, enhanced by strokes, and joint trajectory or rotation curves. It also allows searching massive databases of 3D animation as an application for motion capture system and major animation software. We extract 2D skeletons from strokes and find similar motion sequences by comparing all the important pre-generated key poses in database. To give the system more hints, users can draw joint trajectory and rotations curves that are …

Extension Of Model-Based Fault Diagnosis Techniques For Network Systems, Ahmed Naail Abeer

Computer Science and Engineering Master's Theses

No abstract provided.

Supporting Developer-Onboarding With Enhanced Resource Finding And Visual Exploration, Jianguo Wang

School of Computing: Dissertations, Theses, and Student Research

Understanding the basic structure of a code base and a development team are essential to get new developers up to speed in a software development project. Developers do so through the process of early experimentation with code and the creation of mental models of technical and social structures in a project. However, getting up-to-speed in a new project can be challenging due to difficulties in: finding the right place to begin explorations, expanding the focus to determine relevant resources for tasks, and identifying dependencies across project elements to gain a high-level overview of project structures. In this thesis, I first …

Getting It Right The First Time: Predicted Performance Guarantees From The Analysis Of Emergent Behavior In Autonomous And Semi-Autonomous Systems, Ronald C. Arkin, Damian M. Lyons, Shu Jiang, Prem Nirmal, Munzir Zafar

Faculty Publications

A crucially important aspect for mission-critical robotic operations is ensuring as best as possible that an autonomous system be able to complete its task. In a project for the Defense Threat Reduction Agency (DTRA) we are developing methods to provide such guidance, specifically for counter-Weapons of Mass Destruction (C-WMD) missions. In this paper, we describe the scenarios under consideration, the performance measures and metrics being developed, and an outline of the mechanisms for providing performance guarantees.

Navigation Of Uncertain Terrain By Fusion Of Information From Real And Synthetic Imagery, Damian M. Lyons, Prem Nirmal, D. Paul Benjamin

Faculty Publications

We consider the scenario where an autonomous platform that is searching or traversing a building may observe unstable masonry or may need to travel over unstable rubble. A purely behaviour-based system may handle these challenges but produce behaviour that works against long-terms goals such as reaching a victim as quickly as possible. We extend our work on ADAPT, a cognitive robotics architecture that incorporates 3D simulation and image fusion, to allow the robot to predict the behaviour of physical phenomena, such as falling masonry, and take actions consonant with long-term goals.

We experimentally evaluate a cognitive only and reactive only …